Search found 374 matches
- Fri Mar 20, 2015 5:04 pm
- Forum: Hardware
- Topic: Model 1 MD PCB hacks topic
- Replies: 17
- Views: 37350
- Fri Mar 20, 2015 4:52 pm
- Forum: Hardware
- Topic: Model 1 MD PCB hacks topic
- Replies: 17
- Views: 37350
- Fri Mar 20, 2015 4:44 pm
- Forum: Hardware
- Topic: Model 1 MD PCB hacks topic
- Replies: 17
- Views: 37350
- Fri Mar 20, 2015 4:28 pm
- Forum: Hardware
- Topic: Model 1 MD PCB hacks topic
- Replies: 17
- Views: 37350
- Fri Mar 20, 2015 3:51 pm
- Forum: Hardware
- Topic: Model 1 MD PCB hacks topic
- Replies: 17
- Views: 37350
- Fri Mar 20, 2015 4:58 am
- Forum: Hardware
- Topic: Using the /TIME line for more than bank switching?
- Replies: 13
- Views: 19959
- Fri Mar 20, 2015 4:24 am
- Forum: Hardware
- Topic: Model 1 MD PCB hacks topic
- Replies: 17
- Views: 37350
l_oliveira, your board looks like a VA5 to me, even though it appears to have a 315-5433.. A VA6 has slightly different copper. I noticed in the CPU swap/mods that I did that /AS has a very high undershoot, the 220 Ohm resistor definitely helps smoothing that out. The PSRAM wires coming from the IO ...
- Fri Nov 28, 2014 9:10 pm
- Forum: Megadrive/Genesis
- Topic: Sega Mega Drive/Genesis Collected Works
- Replies: 18
- Views: 16805
- Tue Oct 28, 2014 5:07 pm
- Forum: Hardware
- Topic: Potentiometer Genesis Overclocking and ramifications.
- Replies: 3
- Views: 9450
- Sun Jun 29, 2014 7:25 pm
- Forum: Megadrive/Genesis
- Topic: Sonic 1 Bus-Cycle Tracing Example
- Replies: 19
- Views: 12285
I forgot to say something. Only the counter would be running from 53M. The rest of the system would stay the same. No need to reinvent *everything* I know SDRAM and boy does it suck... Well, yes it's true that it's made for burst accesses and sucks for random accessing. The same can be said for all ...
- Sun Jun 29, 2014 5:10 pm
- Forum: Megadrive/Genesis
- Topic: Sonic 1 Bus-Cycle Tracing Example
- Replies: 19
- Views: 12285
SDRAM may not work at 53MHz? really? lol Also the comparison isn't fair as the MD isn't system synchronous with your FPGA logic. You had to put dual DFFs to prevent metastability on MD's lines, probably not on all, just on the read/write strobes (which is what triggers your internal state machines a...
- Sun Jun 29, 2014 2:14 am
- Forum: Megadrive/Genesis
- Topic: Sonic 1 Bus-Cycle Tracing Example
- Replies: 19
- Views: 12285
- Sat Jun 28, 2014 11:06 pm
- Forum: Megadrive/Genesis
- Topic: Sonic 1 Bus-Cycle Tracing Example
- Replies: 19
- Views: 12285
- Sat Jun 28, 2014 9:59 pm
- Forum: Megadrive/Genesis
- Topic: Sonic 1 Bus-Cycle Tracing Example
- Replies: 19
- Views: 12285
- Sat Jun 28, 2014 12:43 am
- Forum: Megadrive/Genesis
- Topic: Sonic 1 Bus-Cycle Tracing Example
- Replies: 19
- Views: 12285